Chandhu03
Hello @yashh Yeah, of course you can ask them! Doesn’t matter if they’ve moved to a different college as long as they know you well and can genuinely talk about your work or how you were in class, that’s totally fine.
In fact, it’s better to get a letter from someone who actually remembers your skills, rather than picking someone just from your current college who doesn’t know you much. So yeah, if your CS sir/ma’am was your favourite and they saw your potential, definitely ask them!